Love the Lightspeed but wish it had better tone control. So I used Oxide PCB to create a Mach-1 (Greer Lightspeed) but with the tone controls of an Oxide (Ibanez MT-10 Mostortion). A "hybrid".
Circuits are close enough so I just used the Mach-1's R&C values everywhere except the power supply and the tone section which remain all Oxide.
I omitted and jumpered around the Oxide's transistor I/O buffers, used an OPA2134 chip and had to "teepee" clipping diodes because the Mach-1 has more 914s than the Oxide does. Like the Oxide, the tone controls are between the op-amp stages, not after both as in the Mach-1. This gives them an almost "active" feel and they're in fact a bit touchy. I added an 18V option using the PedalPCB charge-pump 3PDT board and a "Symmetric / Asymmetric" switch that gives me the Mach-1's stock (lopsided) 5 diodes or a 3+3 option.
Fun, interesting and rewarding project. Result is excellent and very usable but unique from both its "parents".
Circuits are close enough so I just used the Mach-1's R&C values everywhere except the power supply and the tone section which remain all Oxide.
I omitted and jumpered around the Oxide's transistor I/O buffers, used an OPA2134 chip and had to "teepee" clipping diodes because the Mach-1 has more 914s than the Oxide does. Like the Oxide, the tone controls are between the op-amp stages, not after both as in the Mach-1. This gives them an almost "active" feel and they're in fact a bit touchy. I added an 18V option using the PedalPCB charge-pump 3PDT board and a "Symmetric / Asymmetric" switch that gives me the Mach-1's stock (lopsided) 5 diodes or a 3+3 option.
Fun, interesting and rewarding project. Result is excellent and very usable but unique from both its "parents".
